Final answer:
The abbreviation for "reschedule" is often non-standard, but "Rsch" is a likely choice given the options provided.
Step-by-step explanation:
The abbreviation for "reschedule" is not standardized, and different organizations may use different abbreviations. However, commonly used abbreviations include Rsch or Re. These abbreviations are created by taking the initial letters or syllables of the longer word and omitting the rest. For your question, the most likely correct abbreviation given the options would be Rsch.